High crystalline Na2Ni[Fe(CN)6] particles for a high-stability and low-temperature sodium-ion batteries cathode. (20th February 2019)

• Record Type: Journal Article
• Authors: Ma, Xiao-Hang; Wei, Yi-Yong; Wu, Yao-Dong; Wang, Jiao; Jia, Wei; Zhou, Jia-Hao; Zi, Zhen-Fa; Dai, Jian-Ming
• Is Part Of: Electrochimica acta. Volume 297(2019)
• Page Start: 392
• Page End: 397
• Publication Date: 2019-02-20
• Subjects: Na2Ni[Fe(CN)6] -- High stability -- Cathode -- Low-temperature properties -- Sodium-ion battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.11.063
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstracts: High crystalline Na2 Ni[Fe(CN)6 ] particles are synthesized by a new electrostatic spray assisted coprecipitation method. Their structures and electrochemical properties are analyzed by X-ray powder diffraction, scanning electron microscopy and galvanostatic cell cycling and so on. Given its highly stable structure, the optimized Na2 Ni[Fe(CN)6 ] cathode shows impressive cycling performance with high retention capacity of 89% after 440 cycles at 1 C and excellent rate capability of 56 mAh g −1 at 25 C. In addition, the optimized Na2 Ni[Fe(CN)6 ] cathode achieves superior low temperature performances with retains 87% capacity after 440 cycles at 0 °C and a stable capacity of 54 mAh g −1 can be delivered even at −25 °C after 440 cycles. Such a Na2 Ni[Fe(CN)6 ] sample provides a promising cathode for sodium-ion batteries in large-scale storage systems. Highlights: Highly crystalline Na2 Ni[Fe(CN)6 ] are prepared by a new ESAC method. Na2 Ni[Fe(CN)6 ] shows superior electrochemical properties at different temperatures. Na2 Ni[Fe(CN)6 ] will be a promising cathode for sodium-ion batteries.